package observerPattern.observerBPattern;



/**
 * @program: course
 * @author: lsn
 * @create: 2024-05-05 09:41
 * @description: 角色：主题
 */
public interface Subject {
    public void addObserver(Observer o);
    public void deleteObserver(Observer o);
    public void notifyObservers();
}

